Item 4. CONTROLS AND PROCEDURES.

Evaluation of Disclosure Control and Procedures

UAL and United each maintains controls and procedures that are designed to ensure that information required to be disclosed in the reports filed or submitted by UAL and United to the SEC is recorded, processed, summarized and reported, within the time periods specified by the SEC's rules and forms, and is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. The management of UAL and United, including the Chief Executive Officer and Chief Financial Officer, performed an evaluation to conclude with reasonable assurance that UAL's and United's disclosure controls and procedures were designed and operating effectively to report the information each company is required to disclose in the reports it files with the SEC on a timely basis. Based on that evaluation, the Chief Executive Officer and the Chief Financial Officer of UAL and United have concluded that as of March 31, 2022, disclosure controls and procedures were effective.

Changes in Internal Control over Financial Reporting during the Quarter Ended March 31, 2022

During the three months ended March 31, 2022, there were no changes in UAL's or United's internal control over financial reporting that materially affected, or are reasonably likely to materially affect, their internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934).

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

See Part I, Item 3, Legal Proceedings, of the 2021 Form 10-K for a description of legal proceedings.